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nsZones Dial-Up/Cable/ADSL Block List (DYN) check

The nsZones Dial-Up/Cable/ADSL Block List (DYN) is a specific type of blacklist that lists dynamic IP addresses, such as those from dial-up, cable, and ADSL connections, to help prevent emails from sources that shouldn't be hosting mail servers.

nsZones Dial-Up/Cable/ADSL Block List (DYN) check
Blocklist checker
Check your domain or IP against 144 blocklists.
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Abusix
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abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
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Brukalai.lt
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dan.me.uk
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www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
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rv-soft.info logoRV-SOFT Technology
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www.scientificspam.net logoScientific Spam
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psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
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Taughannock Networks
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Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
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Abusix
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Barracuda Networks
www.spamcop.net logoCisco
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Mailspike
www.nosolicitado.org logoNoSolicitado
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SURBL
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UCEPROTECT
uribl.com logoURIBL
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8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
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Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
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dan.me.uk
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DrMx
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DroneBL
rbl.efnetrbl.org logoEFnet
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Fabel
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GBUdb
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ImproWare
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JIPPG Technologies
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Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
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Mail Baby
www.nordspam.com logoNordSpam
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nsZones
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Polspam
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RedHawk
rv-soft.info logoRV-SOFT Technology
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Schulte
www.scientificspam.net logoScientific Spam
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Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
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Taughannock Networks
www.team-cymru.com logoTeam Cymru
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Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
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Abusix
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Barracuda Networks
www.spamcop.net logoCisco
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Mailspike
www.nosolicitado.org logoNoSolicitado
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SURBL
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UCEPROTECT
uribl.com logoURIBL
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8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
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Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
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dan.me.uk
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DrMx
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DroneBL
rbl.efnetrbl.org logoEFnet
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Fabel
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GBUdb
Blocklist icon
ImproWare
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JIPPG Technologies
Blocklist icon
Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
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Mail Baby
www.nordspam.com logoNordSpam
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nsZones
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Polspam
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RedHawk
rv-soft.info logoRV-SOFT Technology
Blocklist icon
Schulte
www.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
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Taughannock Networks
www.team-cymru.com logoTeam Cymru
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Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networks
www.spamcop.net logoCisco
Blocklist icon
Mailspike
www.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECT
uribl.com logoURIBL
Blocklist icon
8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
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Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
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DrMx
Blocklist icon
DroneBL
rbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
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Mail Baby
www.nordspam.com logoNordSpam
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nsZones
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Polspam
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RedHawk
rv-soft.info logoRV-SOFT Technology
Blocklist icon
Schulte
www.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networks
www.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networks
www.spamcop.net logoCisco
Blocklist icon
Mailspike
www.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECT
uribl.com logoURIBL
Blocklist icon
8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBL
rbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Baby
www.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawk
rv-soft.info logoRV-SOFT Technology
Blocklist icon
Schulte
www.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networks
www.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheft

What is nsZones Dial-Up/Cable/ADSL Block List (DYN)?

The nsZones Dial-Up/Cable/ADSL Block List (DYN) is a specific type of DNS-based blocklist (or DNSBL) that catalogues IP addresses assigned dynamically to users. This includes connections like dial-up, cable modems, and ADSL. Its primary policy is to list netblocks where IP addresses are not static. The operator determines these dynamic ranges by manually reviewing reverse DNS (rDNS) records.

It is important to understand that being on this specific blacklist does not mean you are a spammer. In fact, if you have a dynamic IP address provided by your internet service provider (ISP), it is perfectly normal to be listed. The core principle of this blocklist is that mail should not be sent directly from these types of connections. Instead, users should send email through their ISP's designated mail servers.

Technically, the list operates like other DNS blacklists. A mail server can query it by sending a request with a reversed IP address to the zone dyn.nszones.com. For example, to check the IP 1.2.3.4, the server would query "4.3.2.1.dyn.nszones.com". If the IP is listed, the server receives a specific response code (127.0.0.3), indicating it's a dynamic IP. This zone is also part of a larger, combined blocklist called bl.nszones.com.

Who runs nsZones Dial-Up/Cable/ADSL Block List (DYN)?

The nsZones Dial-Up/Cable/ADSL Block List (DYN) is operated by the organization nsZones. They manage several blocklists that are designed to be defensive tools for mail server administrators, helping to filter spam, viruses, and other unwanted mail based on the source IP address. nsZones emphasizes that their lists only prevent mail delivery at the receiving end, based on the receiver's own policy choices.

nsZones operates multiple zones that target different types of sending behavior and infrastructure. Each blacklist serves a unique purpose for mail filtering. Their primary zones include:

  • bl.nszones.com: A combined zone that includes all IPs from their spam source list and their dynamic list.
  • sbl.nszones.com: A list containing IPs known for sending spam, operating open relays, or being part of a botnet (hijacked PCs).
  • dyn.nszones.com: The focus of this page, this list contains dynamic IP addresses from ADSL, Cable, and networks without proper reverse DNS (PTR records).
  • ubl.nszones.com: A SURBL-style list containing domain names found in spam messages and the PTR records of dynamic networks.

How do I get removed and delisted from nsZones Dial-Up/Cable/ADSL Block List (DYN)?

Before requesting removal, it is critical to understand the purpose of this blocklist. If your IP address is dynamic (assigned by your ISP for home or mobile use), it is supposed to be on this list. In this case, you should not be sending email directly from your IP; instead, you must configure your email client to relay mail through your provider's official mail server.

If you operate a legitimate mail server on a static IP address and believe you have been incorrectly added to this blacklist, you can request removal. nsZones provides a lookup and removal form on their website. Listings have an automatic, free expiration period of five years from the last detected issue. However, they also offer an expedited manual delisting service for a fee of 7.95 EUR. According to nsZones, a paid delisting ensures your IP will not be listed again for the next 24 months.

What's the impact of being listed on nsZones Dial-Up/Cable/ADSL Block List (DYN)?

The impact of being listed on the nsZones Dial-Up/Cable/ADSL Block List (DYN) is generally considered low for most senders. This is because the list's intended use is to block mail sent directly from consumer-grade, dynamic IP addresses. Most mail systems are configured to reject such connections, as this is a very common characteristic of spam sent from infected computers.

However, if a legitimate mail server with a static IP is mistakenly included on this blacklist, the impact can be more significant. Some mail administrators may use this list more broadly, which could cause your emails to be rejected. In such a scenario, your email deliverability would be negatively affected, and pursuing delisting would be the correct course of action.

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